What are the potential errors that can occur when including multiple files in PHP?

When including multiple files in PHP, potential errors can occur if there are naming conflicts between the included files, leading to redeclaration errors or unexpected behavior. To solve this issue, you can use the `require_once` or `include_once` functions instead of `require` or `include` to ensure that each file is only included once, preventing redeclaration errors. 

// Example of including multiple files using require_once
require_once 'file1.php';
require_once 'file2.php';
require_once 'file3.php';

Keywords

include require PHP syntax error fatal error

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